Free Printable Some basic concepts of chemistry

1.

Application of chemistry includes

A.Medicine

B. Agriculture

C. Industries

D. Food

E. Daily purposes

a)

A,B,D,E

b)

B,C,D,E

c)

A,B,C,D,E

d)

None of the options are correct

2.

Chemistry is a branch of study which does not deals with ________________ of matter.

a)

Preparation

b)

Composition

c)

Structure

d)

None of the above is correct answer

3.

Matter plays a major role in chemistry . What are the two classifications of matter?

a)

Preparational and physical

b)

Compositional and chemistry

c)

Preparational and compositional

d)

Physical and chemical

4.

What are the three prime states of matter?

a)

Solid gas and water

b)

Plasma gas and liquid

c)

Gas solid and liquid

d)

Plasma fluid and gas

5.

When a gas freezes first it converts to _____________ and then on further cooling it gets converted to _______________.

Fill up the two blanks with two different states of matter respectively.

(a)

6.

Find the correct order of states of matter arranged in the order of their molecular force of attraction.

G-GAS

S-SOLID

L-LIQUID

a)

G>S>L

b)

S>G>L

c)

G<L<S

d)

S<L<G

7.

On the basis of chemical classification the matter is classified as

a)

Homogenous and heterogenous

b)

mixture and pure substances

c)

elements and compounds

d)

none of the above are correct

8.

There is a uniform composition of substance in _________________________ mixture

a)

HETEROGENOUS

b)

HOMOGENOUS

9.

There is a non- uniform composition of substance in _________________________ mixture

a)

HOMOGENOUS

b)

HETEROGENOUS

10.

Which kind of mixture is seperable?

a)

HOMOGENOUS

b)

HETEROGENOUS

c)

None of the above

d)

All of the above

11.

Which kind of mixture is air?

a)

HOMOGENOUS

b)

HETEROGENOUS

c)

None of the above

d)

All of the above

12.

What is different in mixture and pure substances?

a)

Mixture is composed of substances in any ratio and pure substances are composed in a fixed ratio.

b)

Mixture is composed of substances in a fixed ratio and pure substances are composed in any ratio.

13.

Pure substance is classified further into

a)

Elements and mixture

b)

Mixture and compound

c)

Elements and compounds

14.

How many of the following are elements?

O₂ , HCl , PF₃ , H₂ , O₃ , BeCl₂ , I₂ , C , AlCl_{3 ,}SF₄

a)

8

b)

4

c)

5

d)

10

15.

How many of the following are NOT elements?

H₂O , HCl , PF₃ , H₂ , O₃ , BeCl₂ , KI , C , AlCl_{3 ,}SF₄

a)

8

b)

4

c)

7

d)

10

16.

H₂and CH₄have something in common what is it ?

a)

They have same number of hydrogen atoms

b)

They are organic in nature

c)

They both are called as molecule

d)

They are elements

17.

Which of the following are chemical properties?

Basicity, Melting point, Reactivity, Boiling point , Colour, Odour , Combustability, Density, Mass, Acidity and Toxicity

a)

6

b)

11

c)

8

d)

5

18.

Match the following with the correct symbol of their SI unit:

a)

A.4, B.2 , C.6, D.1 , E.5 , F.3

b)

A.4, B.5 , C.1, D.2 , E.6, F.3

c)

A.4, B.2 , C.1, D.3 , E.5 , F.6

d)

A5, B.1 , C.3, D.4, E.6 , F.2

19.

WHICH OF THE FOLLOWING IS NOT EQUAL TO ONE METRE?

a)

10³mm

b)

10⁹pm

c)

10¹⁵fm

d)

10⁶μm

20.

Which of the following is equal to one mA?

a)

10^-9MA

b)

10^-12GA

c)

10^-6kA

d)

All of the above

21.

The amount of matter present in a substance is called

(a)

22.

Which of the following is used to measure mass accurately?

a)

Analytical balance

b)

Thermometer

c)

Barometer

d)

massometer

23.

Volume is the space occupied by a substance.

a)

True

b)

False

24.

Which of the following is SI unit of volume

a)

cm³

b)

L

c)

mL

d)

m³

25.

1L is NOT equal to

a)

10 dm³

b)

10³cm³

c)

10^-3m³

d)

1000mL

26.

Which of the following is not used to measure volume?

a)

Burette

b)

Graduated cylinder

c)

Volumetric flask

d)

none of these

27.

SI unit of density is

a)

kgL^-1

b)

gmL^-1

c)

kgm^-3

d)

gdm^-3

28.

how many common scales does temperature have?

a)

3

b)

1 to 100

c)

-273.15 to +273.15

d)

All of the above

29.

At what temperature degree celsius and degree fahrenheit are same?

a)

-273.15

b)

There is no such temperature

c)

-40

30.

Name the instrument used to measure temperature.

(a)

31.

What is the genreal form of scientific notation?

a)

$N+10^{N\ \ },\ N\ \epsilon\ \left(1.00...-9.99...\right)$

b)

$N\times10^{n\ },N\ \epsilon\ \left(1.99-0.111\right)$

c)

$N\times10^{n\ },\ N\ \epsilon\ \left(1.00..\ -\ 9.99..\right)$

d)

All of the above are correct

32.

Convert -40 degree fahrenheit into kelvin.

a)

233.15K

b)

313.15K

c)

258.75K

d)

-40K

33.

$\left(9.6\times10^5\right)\times\left(3.3\times10^{-2}\right)$ Find the power of 10 of the result in scientific notation.

a)

5

b)

4

c)

-2

d)

3

34.

$\left(2.5\times10^{-2}\right)-\left(4.8\ \times10^{-3}\right)$

Find the answer in scientific notation:

a)

$20.2\times10^{-3}$

b)

$2.02\times10^{-3}$

c)

$20.2\times10^{-2}$

d)

$2.02\times10^{-2}$

35.

Which of the following numbers have three significant figures?

0.300 , 0.002, 1.09 , 522, 562.0, 5.00 , 0.00010 , 66.0 , 1.100, 1.00001

a)

5

b)

3

c)

2

d)

4

36.

1.2003+9.250+3.01

The correct answer is

a)

13.4603

b)

13.50

c)

13.4

d)

13.5

37.

3.151+2.23+1.020

Find the correct answer

a)

6.401

b)

6.4

c)

6.40

d)

7.00

38.

How many seconds are there in 22hours?
1. 11 x 7200
2. 22 x 3600
3. 11x 72000
4. 22 x 36000
5. 79200
6.7920
Choose the correct calculations only

a)

1,3,5

b)

1,2,5

c)

1,2,3,4,5

d)

1,4,6

39.

Which of the following law was given by Antoine Lavoisier?

a)

Law of conservation of mass

b)

Law of definite proportion

c)

Law of definite composition

d)

Only two of the options are correct

40.

Who was not a french chemist among the following?

a)

John Dalton

b)

Antoine Laviosier

c)

Joseph Proust

d)

Gay lussac

e)

Avagadro

41.

How manyof the following laws need constant temperature and pressure as prime condition to get applicable?

1.Law of conservation of mass

2.Law of definite proportion

3.Law of multiple proportion

4.Gay Lussac's Law of gaseous voloume

5.Avagadro Law

a)

1

b)

2

c)

3

d)

4

42.

Which of the following is not postulated in Dalton's atomic theory?

a)

Mass is neither created nor destroyed.

b)

Matter consists of indivisible atoms.

c)

There is a rearrangement in the atoms of reactants in a chemical reaction.

d)

Compounds are formed due to the combinmation of atoms of various elements in a fixed ratio.

43.

$1\ amu\ =\ 1.66056\ \times10^xg$
If the amu conversion is in kg then what will be the value of x changed to?

a)

-x

b)

x+3

c)

x-3

d)

x

44.

Find the mass of one atom of oxygen in amu if the mass of one atom of oxygen in g is $2.656\ \times10^{-23}g$ and $1\ amu\ =1.66056\times10^{-24}g$

a)

1.599

b)

15.99

c)

159.9

d)

0.1599

45.

amu has been replaced by

a)

unit

b)

unified mass

46.

Find the molecular mass of $BeCl_2$

a)

80 u

b)

79u

c)

78 u

d)

80.5

47.

For which of the following molecule molecular mass can be calculated instead from its formula mass?

a)

NaBr

b)

KI

c)

SO2

d)

CaCl2

48.

Which of the following has greater formula mass?

a)

KI

b)

MgBr₂

c)

NaCl

d)

CaF₂

49.

Round of the following number to 3 significant number

1.29654352

(a)

50.

The above image is related to the law given by

a)

Avogadro

b)

Joseph Proust

c)

Antoine Lavoisier

d)

Gay Lussac

Some basic concepts of chemistry

Total questions: 50

Worksheet time: 32mins

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